<template>
  <div class="app-container">
    <el-form
      :model="queryParams"
      ref="queryForm"
      :inline="true"
      label-width="68px"
    >
      <el-form-item label="文件名" prop="originalFileName">
        <el-input
          v-model="queryParams.originalFileName"
          placeholder="请输入文件名"
          clearable
          style="width: 240px;"
          size="small"
          @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <!--<el-form-item label="上传时间">
        <el-date-picker
          v-model="dateRange"
          size="small"
          style="width: 240px"
          value-format="yyyy-MM-dd"
          type="daterange"
          range-separator="-"
          start-placeholder="开始日期"
          end-placeholder="结束日期"
        ></el-date-picker>
      </el-form-item>-->
      <el-form-item>
        <el-button
          type="primary"
          icon="el-icon-search"
          size="mini"
          @click="handleQuery"
          >搜索</el-button
        >
        <el-button icon="el-icon-refresh" size="mini" @click="resetQuery"
          >重置</el-button
        >
      </el-form-item>
    </el-form>

    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button
          type="primary"
          icon="el-icon-upload"
          size="mini"
          @click="handleUpload"
          v-hasPermi="['post:sys:file:upload']"
          >上传文件</el-button
        >
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="warning"
          icon="el-icon-setting"
          size="mini"
          @click="storageTypeSetting"
          v-hasPermi="['put:sys:file:storageType:setting']"
          >存储设置</el-button
        >
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="danger"
          icon="el-icon-delete"
          size="mini"
          :disabled="multiple"
          @click="handleDelete"
          v-hasPermi="['delete:sys:file']"
          >删除</el-button
        >
      </el-col>
    </el-row>

    <el-table
      class="loading-area"
      :data="list"
      @expand-change="expandSelect"
      @selection-change="handleSelectionChange"
      :row-key="getRowKeys"
      :expand-row-keys="expands"
    >
      <el-table-column type="expand">
        <template slot-scope="props">
          <el-form label-position="left" inline class="table-expand">
            <el-form-item label="新文件名:">
              <span>{{ props.row.newFileName }}</span>
            </el-form-item>
            <el-form-item label="保存路径:">
              <span>{{ props.row.savePath }}</span>
            </el-form-item>
            <el-form-item label="文件MD5:">
              <span>{{ props.row.fileMd5 }}</span>
            </el-form-item>
            <el-form-item label="存储方式:">
              <span>{{ props.row.storageType }}</span>
            </el-form-item>
            <el-form-item label="文件后缀:">
              <span>{{ props.row.fileSuffix }}</span>
            </el-form-item>
            <el-form-item
              label="文件预览:"
              v-if="isImageAsset(props.row.fileSuffix)"
            >
              <el-image
                style="width: 200px; height: 200px"
                :src="props.row.fileUrl"
                :preview-src-list="previewImgUrls"
              >
              </el-image>
            </el-form-item>
          </el-form>
        </template>
      </el-table-column>
      <el-table-column type="selection" width="55" align="center" />
      <el-table-column label="ID" align="center" prop="id" width="50" />
      <el-table-column label="文件名" align="left" prop="originalFileName" />
      <el-table-column label="访问地址" align="left" prop="fileUrl" />
      <el-table-column
        label="文件大小(字节)"
        align="center"
        prop="fileLength"
      />
      <el-table-column
        label="上传时间"
        align="center"
        prop="createTime"
        width="180"
      >
        <template slot-scope="scope">
          <span>{{ parseTime(scope.row.createTime) }}</span>
        </template>
      </el-table-column>
      <el-table-column
        label="操作"
        align="center"
        class-name="small-padding fixed-width"
      >
        <template slot-scope="scope">
          <el-button
            size="mini"
            type="text"
            icon="el-icon-download"
            @click="handleDownload(scope.row)"
            v-hasPermi="['get:sys:file:download']"
            >下载</el-button
          >
          <el-button
            size="mini"
            type="text"
            icon="el-icon-delete"
            @click="handleDelete(scope.row)"
            v-hasPermi="['delete:sys:file']"
            >删除</el-button
          >
        </template>
      </el-table-column>
    </el-table>

    <pagination
      v-show="total > 0"
      :total="total"
      :page.sync="queryParams.pageNum"
      :limit.sync="queryParams.pageSize"
      @pagination="getList"
    />

    <el-dialog :title="title" :visible.sync="open" width="500px">
      <el-upload
        ref="upload"
        drag
        multiple
        :action="uploadFile()"
        :http-request="uploadRequest"
        :on-success="handleSuccess"
        :file-list="fileList"
        :auto-upload="false"
      >
        <i class="el-icon-upload"></i>
        <div class="el-upload__text">将文件拖到此处，或<em>点击上传</em></div>
      </el-upload>
      <div slot="footer" class="dialog-footer">
        <el-button
          icon="el-icon-upload"
          :loading="loading"
          type="primary"
          @click="submitUpload"
          >上传文件</el-button
        >
        <el-button @click="cancel">取 消</el-button>
      </div>
    </el-dialog>
    <el-dialog
      title="文件存储方式设置"
      :visible.sync="storageTypeDialogOpen"
      width="400px"
    >
      <el-select
        v-model="storageType"
        placeholder="文件存储方式设置"
        style="width: 100%"
      >
        <el-option
          v-for="dict in storageTypeOptions"
          :key="dict.dictCode"
          :label="dict.dictLabel"
          :value="dict.dictCode"
        />
      </el-select>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="save">保存</el-button>
        <el-button @click="close">取 消</el-button>
      </div>
    </el-dialog>
  </div>
</template>
<style lang="scss" scoped>
.table-expand {
  font-size: 0;
}
/deep/ .table-expand label {
  width: 100px;
  color: #99a9bf;
}
/deep/ .table-expand .el-form-item {
  margin-right: 0;
  margin-bottom: 0;
  width: 100%;
}

/deep/ .el-upload-dragger {
  width: 460px;
}
</style>
<script>
import {
  list,
  remove,
  storageTypeSetting,
  getCurrStorageType,
  upload
} from "@/api/sys/file";
import { download } from "@/utils/commonUtil";
export default {
  name: "SysFile",
  data() {
    return {
      // 选中数组
      ids: [],
      // 非多个禁用
      multiple: true,
      // 弹出层标题
      title: "",
      storageType: "",
      // 是否显示弹出层
      open: false,
      loading: false,
      storageTypeDialogOpen: false,
      // 存储方式数据字典
      storageTypeOptions: [],
      //上传文件列表
      fileList: [],
      newData: {},
      //预览图片URL集合
      previewImgUrls: [],
      // 总条数
      total: 0,
      // 表格数据
      list: [],
      // 日期范围
      dateRange: [],
      // 查询参数
      queryParams: {
        pageNum: 1,
        pageSize: 10,
        username: undefined
      },
      getRowKeys(row) {
        // 行数据的Key
        return row.id;
      },
      expands: [] // 通过该属性设置Table目前的展开行，需要设置row-key属性才能使用，该属性为展开行的keys数组
    };
  },
  created() {
    this.getList();
    getCurrStorageType().then(res => {
      this.storageType = res.data;
    });
  },
  methods: {
    // table每次只能展开一行
    expandSelect(row, expandedRows) {
      this.expands = [];
      if (expandedRows.length > 0) {
        row ? this.expands.push(row.id) : "";
      }
    },
    uploadRequest(param) {
      this.fileList.push(param.file); // 一般情况下是在这里创建FormData对象，但我们需要上传多个文件，为避免发送多次请求，因此在这里只进行文件的获取，param可以拿到文件上传的所有信息
    },
    /** 查询文件列表 */
    getList() {
      this.previewImgUrls = [];
      list(this.addDateRange(this.queryParams, this.dateRange)).then(
        response => {
          this.list = response.data.rows;
          this.total = response.data.total;
          for (let file of this.list) {
            if (this.isImageAsset(file.fileSuffix)) {
              this.previewImgUrls.push(file.fileUrl);
            }
          }
        }
      );
    },
    uploadFile() {
      return process.env.VUE_APP_BASE_API + "/api/sys/file/upload";
    },
    //判断是否为图片
    isImageAsset(fileSuffix) {
      return (
        [
          "png",
          "jpg",
          "jpeg",
          "bmp",
          "gif",
          "webp",
          "psd",
          "svg",
          "tiff"
        ].indexOf(fileSuffix.toLowerCase()) !== -1
      );
    },
    /** 搜索按钮操作 */
    handleQuery() {
      this.queryParams.pageNum = 1;
      this.getList();
    },
    /** 重置按钮操作 */
    resetQuery() {
      this.dateRange = [];
      this.resetForm("queryForm");
      this.handleQuery();
    },
    // 多选框选中数据
    handleSelectionChange(selection) {
      this.ids = selection.map(item => item.id);
      this.multiple = !selection.length;
    },
    /** 上传按钮操作 */
    handleUpload() {
      this.fileList = [];
      this.open = true;
      this.loading = false;
      this.title = "文件上传";
    },
    // 取消按钮
    cancel() {
      this.fileList = [];
      this.open = false;
    },
    storageTypeSetting() {
      this.getDicts("file_storage_type").then(res => {
        this.storageTypeOptions = res.data;
        this.storageTypeDialogOpen = true;
      });
    },
    close() {
      this.storageTypeDialogOpen = false;
    },
    /** 下载按钮操作 */
    handleDownload(row) {
      const fileUrl = row.fileUrl;
      const fileName = row.originalFileName;
      download(fileUrl, fileName);
    },
    /** 删除按钮操作 */
    handleDelete(row) {
      const ids = row.id || this.ids;
      this.$confirm('是否确认删除编号为"' + ids + '"的数据项?', "警告", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning"
      })
        .then(function() {
          return remove(ids);
        })
        .then(() => {
          this.getList();
          this.msgSuccess("删除成功");
        })
        .catch(function() {});
    },
    submitUpload() {
      this.loading = true;
      const upData = new FormData();
      this.$refs.upload.submit(); // 这里是执行文件上传的函数，其实也就是获取我们要上传的文件
      this.fileList.forEach(function(file) {
        // 因为要上传多个文件，所以需要遍历
        upData.append("file", file, file.name);
      });
      upData.append("body", JSON.stringify(this.newData)); // 这里需要转换一下格式传给后台
      upload(upData).then(response => {
        this.loading = false;
        if (response.code === 0) {
          this.msgSuccess("上传成功");
          this.$refs.upload.clearFiles();
          this.fileList = [];
          this.open = false;
          this.getList();
        } else {
          this.msgError(response.msg);
        }
      });
    },
    save() {
      storageTypeSetting(this.storageType).then(response => {
        if (response.code === 0) {
          this.msgSuccess("设置成功");
          this.storageTypeDialogOpen = false;
        } else {
          this.msgError(response.msg);
        }
      });
    },
    handleSuccess(response, file, fileList) {
      /* this.$refs.upload.clearFiles();
        this.fileList = [];
        this.open = false;
        this.getList();*/
    }
  }
};
</script>
